公开(公告)号：US3622864A

公开(公告)日：1971-11-23

申请号：US3622864D

申请日：1969-07-09

Applicant: COULTER ELECTRONICS

Inventor： CLAPS WILLIAM A ,  FIGUEROA DAVID R

IPC: G01N15/12 ,  G01N27/00 ,  G05F1/10 ,  G06F7/38

CPC classification number: G01N15/1227

Abstract: To improve the precision operation of a ''''Coulter Counter'''' particle analyzer, which is subject to small magnitude, yet statistically important input power voltage changes that are random in nature and magnitude, the current applied to the microscopic sensing aperture and the voltage applied to the threshold circuits, which monitor and respond to the amplitudes of the particle signals derived from the sensing aperture, are caused to track one another; so that variations of input power do not adversely affect the precision output of the particle analyzer. In series with both the sensing aperture circuit and the threshold circuits is the power supply, a polarity control switch and a current sensing resistor. Interposed between the current sensing resistor and the threshold circuits is an absolute value amplifier, which applies to the threshold circuits a voltage proportional to the aperture current. Additionally, the output from the absolute value amplifier is compared with an arbitrary voltage reference, and the result of the comparison is employed to determine both the aperture current and the threshold voltage.

公开(公告)号：US3688191A

公开(公告)日：1972-08-29

申请号：US3688191D

申请日：1970-09-10

Applicant: COULTER ELECTRONICS

Inventor： CLAPS WILLIAM A

IPC: G01N15/12

CPC classification number: G01N15/12

Abstract: Electronic particle study apparatus for studying particles, particularly those whose density and size make difficult maintenance of a dispersion in a fluid medium and which permits total sample recovery. A pair of chambers is provided through which a continuously filtered electrolyte flows. The chambers are separated by a Coulter type scanning aperture means and drip chamber means is provided for electrically isolating one of said chambers. A recirculating system for supplying filtered electrolyte to the chambers including storage means, recirculating means, pump means and filter means, for moving of the electrolyte into and out of the chambers and for collecting the particulate sample.

Abstract translation: 用于研究颗粒的电子颗粒研究装置，特别是那些密度和尺寸难以维持流体介质中的分散体并且允许总样品回收的颗粒研究装置。 提供一对室，连续过滤的电解液通过该室流过。 这些腔室由Coulter型扫描孔装置分离，并且提供滴水室装置用于电隔离所述腔室之一。 一种用于将过滤的电解质供应到室的循环系统，包括存储装置，再循环装置，泵装置和过滤装置，用于将电解质移入和移出室并用于收集颗粒样品。

公开(公告)号：US3295059A

公开(公告)日：1966-12-27

申请号：US46740665

申请日：1965-06-28

Applicant: COULTER ELECTRONICS

Inventor： COULTER WALLACE H ,  HOGG WALTER R ,  MORAN JOSEPH P ,  CLAPS WILLIAM A

IPC: G01N15/12 ,  H03K21/02

CPC classification number: G01N15/1227 ,  G01N2015/1263 ,  H03K21/02

公开(公告)号：US3259842A

公开(公告)日：1966-07-05

申请号：US83486059

申请日：1959-08-19

Applicant: COULTER ELECTRONICS

Inventor： COULTER WALLACE H ,  HOGG WALTER R ,  MORAN JOSEPH P ,  CLAPS WILLIAM A

IPC: G01N15/12

CPC classification number: G01N15/1227 ,  G01N2015/1263